mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

Air Shutoff Valve, Location/Task/Function|Page 7909 > < Air Shutoff Valve, Location/Task/Function
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Illustrates Engine 166 
126 

Aspirator shutoff valve (combination valve: check valve integrated) 

When air pump is switched off, preventing air being inducted into the exhaust ports, as a result of the flow of the exhaust gases.

Air Shutoff Valve, Function

Air Shutoff Valve, Function

Illustration shows air shutoff valve with integrated check valve
126 

Air shutoff valve

126a 

Vacuum diaphragm

126b 

Check valve

to air pump switchover valve

Injected air from air pump

Injected air to cylinder head

Air Shutoff Valve, Location/Task/Function|Page 7909 > < Air Shutoff Valve, Location/Task/Function